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34 Chapter 2 Testing Video Displays
Testing digital computer (IT) FPDs
This section describes how to test digital computer (IT) displays.
To test a digital FPD:
1. Use a DVI-I cable to connect the DVI output on the generator with the DVI connector on
the display under test.
2. Place the generator in Digital Friendly mode by holding down the G and B keys while
starting the generator.
Alternatively, you can set the Digital Friendly mode by entering the following command:
SROP 2 4; ALLU
The Digital Friendly mode ensures that the generator will output a digital signal on the
DVI connector, when selecting analog formats from the format library.
3. Determine the formats to test. Auto-select the formats to test by enabling the
generator’s DDC-based auto configuration. See “Selecting formats automatically” on
page 25 for instructions.
4. (Optional) To view the EDID on the display, use the Image knob to select the EdidData
image and follow the directions on the display. Verify that the EDID specifies the formats
required for testing.
Alternatively, you can load the image with the following command:
IMGL EdidData; IMGU
5. Determine which images to test. For digital flat panel displays, you typically want to
select images to test for pixel anomalies, persistence, photometry and resolution
related problems. For more information, see “Selecting images” on page 28 or
Appendix B, “Image Reference.”
Verify the test set-up:
1. Using the Format knob, select one of the formats you have identified.
Alternatively, you can load the format with the following command:
FMTL format_name; FMTU
2. Using the Image knob, select a suitable image such as SMPTE133. Verify that the
display is presenting the image to ensure that the generator is sending a valid signal to
the display.
Alternatively, you can load the image with the following command:
IMGL SMPTE133; IMGU
Test the display:
1. Using the Format knob, select the first test format identified.